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- Title
Possible chiral spin liquid state in the S = 1/2 kagome Heisenberg model.
- Authors
Sun, Rong-Yang; Jin, Hui-Ke; Tu, Hong-Hao; Zhou, Yi
- Abstract
The nature of the ground state for the S = 1/2 Kagome Heisenberg antiferromagnet (KHAF) has been elusive. We revisit this challenging problem and provide numerical evidence that its ground state is a chiral spin liquid. Combining the density matrix renormalization group method with analytical analyses, we demonstrate that the previously observed chiral spin liquid phase in the KHAF with longer-range couplings is stable in a broader region of the phase diagram. We characterize the nature of the ground state by computing energy derivatives, revealing the ground-state degeneracy arising from the spontaneous breaking of the time-reversal symmetry, and targeting the semion sector. We further investigate the phase diagram in the vicinity of the KHAF and observe a 3 × 3 magnetically ordered phase and two valence-bond crystal phases.
- Subjects
HEISENBERG model; GROUND state energy; DENSITY matrices; RENORMALIZATION (Physics); RENORMALIZATION group; SYMMETRY breaking; PHASE diagrams; CHIRALITY of nuclear particles
- Publication
NPJ Quantum Materials, 2024, Vol 9, Issue 1, p1
- ISSN
2397-4648
- Publication type
Article
- DOI
10.1038/s41535-024-00627-5